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Test against various invariants:
- Every non-root node must have a name
- The root node muts not have a name
- The name must not be ".." or "."
- The name must not contain '/'
- The loop that chases parent pointers must terminate, i.e. we must
never reach the starting state again (link loop).
Furthermore, make sure the sum of all path components plus separators
does not overflow.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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If rdsquashfs describes a filesystem, is configured to use a prefix-path
and a file contains a space, the resulting input path has the prefix
printed as is and the rest of the string in quotation marks.
gensquashfs simply takes the entire rest of the line as is as its
input path and no longer finds the file.
Fix this by omitting the escapes and quotation marks for the
input path.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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If a SquashFS archive contains file names with '..', '/' or similar
nonsense in them, the unpacking code already refuses to process them,
but the 'describe' code path simply triggers an assert that might not
be there if the binary was compiled with NDEBUG defined.
This commit replaces the assert with propper error handling that also
reports on why things are failing and adds an additional check in the
describe_tree function that tests if the file name is sane.
Reported-by: Zachary Dremann <dremann@gmail.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Instead of having the binary programs in randomly named subdirectories,
move all of them to a "bin" subdirectory, similar to the utility
libraries that have subdirectories within "lib" and give the
subdirectories the propper names (e.g. have gensquashfs source in a
directory *actually* named "gensquashfs").
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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